diff --git a/CHANGELOG.md b/CHANGELOG.md
index 9607a73d..2e192a9e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -8,6 +8,10 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 
 For a full diff see [`3.5.0...main`][3.5.0...main].
 
+### Changed
+
+- Allowed installation on PHP 8.4 ([#841]), by [@localheinz]
+
 ## [`3.5.0`][3.5.0]
 
 For a full diff see [`3.4.0...3.5.0`][3.4.0...3.5.0].
@@ -190,6 +194,7 @@ For a full diff see [`8849fc6...1.0.0`][8849fc6...1.0.0].
 [#682]: https://github.com/ergebnis/json-printer/pull/682
 [#752]: https://github.com/ergebnis/json-printer/pull/752
 [#753]: https://github.com/ergebnis/json-printer/pull/753
+[#841]: https://github.com/ergebnis/json-printer/pull/841
 
 [@ergebnis]: https://github.com/ergebnis
 [@localheinz]: https://github.com/localheinz
diff --git a/composer.json b/composer.json
index 41f32877..db175dc8 100644
--- a/composer.json
+++ b/composer.json
@@ -22,7 +22,7 @@
     "security": "https://github.com/ergebnis/json-printer/blob/main/.github/SECURITY.md"
   },
   "require": {
-    "php": "~7.4.0 || ~8.0.0 || ~8.1.0 || ~8.2.0 || ~8.3.0",
+    "php": "~7.4.0 || ~8.0.0 || ~8.1.0 || ~8.2.0 || ~8.3.0 || ~8.4.0",
     "ext-json": "*",
     "ext-mbstring": "*"
   },
diff --git a/composer.lock b/composer.lock
index c64b81b7..90695ebf 100644
--- a/composer.lock
+++ b/composer.lock
@@ -4,7 +4,7 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
-    "content-hash": "86ff2fd24de020f567d030949951aa2b",
+    "content-hash": "112202c4b472e50931e5579ea54ed54d",
     "packages": [],
     "packages-dev": [
         {
@@ -6654,7 +6654,7 @@
     "prefer-stable": false,
     "prefer-lowest": false,
     "platform": {
-        "php": "~7.4.0 || ~8.0.0 || ~8.1.0 || ~8.2.0 || ~8.3.0",
+        "php": "~7.4.0 || ~8.0.0 || ~8.1.0 || ~8.2.0 || ~8.3.0 || ~8.4.0",
         "ext-json": "*",
         "ext-mbstring": "*"
     },